23A Alkaline Battery is a 12 Volt alkaline battery that can be used in a variety of electronic devices such as watches, red dot scopes laser sights, digital cameras, night vision scopes riflescopes, key fobs, medical devices and 35mm film cameras. 23A Alkaline Battery is cylindrical, smaller than an AAA battery, measuring only 28.9 mm long and 10.3 mm in diameter, with a typical weight of 8 grams. Sometimes, this battery cannot be confused with a similar single-cell N battery.